Pulley sheave



Nw. 9,1926. y 1,606,175

1'; oLlNGER PULLEY sHEAvEf* 'original Filed N'pv. 21. 1921 Awome Patented Nov. 9, i926.Y

gf, :paires steeg saraar ,carreau y THOMAS OLINGEN, or I-iOLLANnivrrcrrreaN, assitance-TO FEDERAL MANUFAOTUR- i ING COMPANY, or HOLLAND, MrcHrGeN, 4a CORPORATION or MICHIGAN.

PULLNY sHnAvn.

original application flied November ai, 1921, serial No. 516,541. Divided and this 'appiieatimiaied July 'y 11, 1923.A VSerial No. l650,800.v

This invention relates to a pulley o1 sheave adapted to be used in pulleys, being a division of my pending application Ser. No. 516,5et1, filed Nov. 21, 1921, which has become Patent No. 1,501,290, patented July 15, 1924. The sheave forming the subject matter of the present invention is particularly adapted for use in the manufacture of sheet metal pulleys such as are used in installing the draft chains of furnaces, though not in any sense limited in use to the one type of pulley named, and the construction shown and described hereafter is one in which large quantity manufacture at low cost coupled with a durable construction is `readily attained. Essentially the sheave consists of two parts of identical construction, each forming one half of the sheave,v

two of the parts being placed back to back and permanently secured together in a novel manner for the completion of the sheave. And this attachment is one very simple to make, interengaging tongues being struck from the contacting backs of the two parts in the same direction which preclude th-e separation of the parts. My invention has for its object and purpose, the provision of a sheave having the above described ends in view, all of which will appear fully and in detail as understanding of the invention is had from the following description, Vtaken in connection with the accompanying drawing, in which, I y

Fig. 1 is a side elevation of the pulley sheavemade in accordance with my invention.

Fig. 2 is a central vertical section there. through, and

Fig. 3 is a perspective view of the sheave looking toward one side and at one edge of the same.

Like reference characters refer to like parts in the dierent figures of the drawing.

In the construction ofthe sheave, two halves or parts of identical form' are made from she-et metal, said parts having flat. backs 1 and 2 of circular outline, from each of which atl the edges, outwardly curved flanges 3 project in opposite directions when the backs 1 and 2 are placed in contact with each other so that when the backs are secured together, the said flanges 3 provide a continuous groove entirely around the sheave for the reception of a cable, chain ble and practical.

or other flexible member such as is commonly used with pulleys. Each of the halves or parts of the sheave has a centrally located hub 4i pressed therefrom, the two hubs extending in opposite directions and in alinement with each other in the completed sheave.

It Will be noted `that so far as described,

the two halves of the sheaves are absolutely identical in'every respect and can be made with` the same dies. The two* halves are placed with their backs 1 and 2 in contact and tongues.V 5 and 6 struck from the backs 2 and v1 respectively, in the same direction, said tongues 5 from the back y2 being bent outwardly nearly in parallelism with the flange 3 and the tongues 6 from theback 1 passing through the openings Vin the back 2 left by striking the tongues 5 therefrom and then being bent so as to lie in close contact with and linterlock with the said tongues 5. vThis makes a secure and permanent connection ofthe two halves of the sheave and the completed sheave has the said tongues 5 and lying within the plane of the outer edges of the flange 3 so as lnot to project to interfere with the hanger in which the sheave may be mounted, thus allowing free rotation of the sheave at all times. v

The construction is very simple yet dura- But one set Of'dies is required and the connection of two parts is a practically instantaneous operation, all of the tongues of both parts being punched at the saine time Vand bent so as to interlock with each other by a simple punch press operation. A large quantity production atl very low cost is ossible and the invention is veryvaluablein this respect and has so proved in the construction of hundreds of thousands of the sheaves since the invention was made.

I claim:

` 1. A sheave comprising two halves placed together back to back, and tangs struck from both the contacting backs of the halves of the sheave in the same direction and interengaged to permanently connect said halves of the sheave together.

2. A sheave comprising two identical halves, each formed from a single piece of sheet metal and each having a back and an outwardly extending flange` said backs of the two halves of the sheave being placed in Contacty relation, and tongues struck from both backs in the same direction and interlocked to permanently connect said halves of the'sheave together.V

3. A sheave comprising two identically formed halves each made from a single piece of sheet metal, tongues struck from one of said halves outwardly, and other tongues struck from the other-hall ofthe 10 make an interlocking engagement vvher-eloyY the said halves of the sheave are perma- 15 nently secured together.

In testimony whereof I affix my signature.

THOMAS OLINGER. 

